fm10k: Add support for PF <-> VF mailbox
This patch adds support for the PF <-> VF mailbox. It functions similar to the PF <-> SM mailbox however there are several modifications made to improve the reliability of the mailbox itself. In addition the PF/VF mailbox is much smaller an only supports a total size of 16 DWORDs vs the 1024 DWORDS provided for the PF/SM mailbox. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>hifive-unleashed-5.1
Alexander Duyck
Jeff Kirsher
parent
5cd5e2e982
commit
b651957c20
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@ -511,6 +511,148 @@ static s32 fm10k_mbx_push_tail(struct fm10k_hw *hw,
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return 0;
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}
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/* pre-generated data for generating the CRC based on the poly 0xAC9A. */
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static const u16 fm10k_crc_16b_table[256] = {
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0x0000, 0x7956, 0xF2AC, 0x8BFA, 0xBC6D, 0xC53B, 0x4EC1, 0x3797,
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0x21EF, 0x58B9, 0xD343, 0xAA15, 0x9D82, 0xE4D4, 0x6F2E, 0x1678,
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0x43DE, 0x3A88, 0xB172, 0xC824, 0xFFB3, 0x86E5, 0x0D1F, 0x7449,
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0x6231, 0x1B67, 0x909D, 0xE9CB, 0xDE5C, 0xA70A, 0x2CF0, 0x55A6,
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0x87BC, 0xFEEA, 0x7510, 0x0C46, 0x3BD1, 0x4287, 0xC97D, 0xB02B,
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0xA653, 0xDF05, 0x54FF, 0x2DA9, 0x1A3E, 0x6368, 0xE892, 0x91C4,
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0xC462, 0xBD34, 0x36CE, 0x4F98, 0x780F, 0x0159, 0x8AA3, 0xF3F5,
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0xE58D, 0x9CDB, 0x1721, 0x6E77, 0x59E0, 0x20B6, 0xAB4C, 0xD21A,
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0x564D, 0x2F1B, 0xA4E1, 0xDDB7, 0xEA20, 0x9376, 0x188C, 0x61DA,
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0x77A2, 0x0EF4, 0x850E, 0xFC58, 0xCBCF, 0xB299, 0x3963, 0x4035,
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0x1593, 0x6CC5, 0xE73F, 0x9E69, 0xA9FE, 0xD0A8, 0x5B52, 0x2204,
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0x347C, 0x4D2A, 0xC6D0, 0xBF86, 0x8811, 0xF147, 0x7ABD, 0x03EB,
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0xD1F1, 0xA8A7, 0x235D, 0x5A0B, 0x6D9C, 0x14CA, 0x9F30, 0xE666,
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0xF01E, 0x8948, 0x02B2, 0x7BE4, 0x4C73, 0x3525, 0xBEDF, 0xC789,
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0x922F, 0xEB79, 0x6083, 0x19D5, 0x2E42, 0x5714, 0xDCEE, 0xA5B8,
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0xB3C0, 0xCA96, 0x416C, 0x383A, 0x0FAD, 0x76FB, 0xFD01, 0x8457,
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0xAC9A, 0xD5CC, 0x5E36, 0x2760, 0x10F7, 0x69A1, 0xE25B, 0x9B0D,
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0x8D75, 0xF423, 0x7FD9, 0x068F, 0x3118, 0x484E, 0xC3B4, 0xBAE2,
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0xEF44, 0x9612, 0x1DE8, 0x64BE, 0x5329, 0x2A7F, 0xA185, 0xD8D3,
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0xCEAB, 0xB7FD, 0x3C07, 0x4551, 0x72C6, 0x0B90, 0x806A, 0xF93C,
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0x2B26, 0x5270, 0xD98A, 0xA0DC, 0x974B, 0xEE1D, 0x65E7, 0x1CB1,
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0x0AC9, 0x739F, 0xF865, 0x8133, 0xB6A4, 0xCFF2, 0x4408, 0x3D5E,
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0x68F8, 0x11AE, 0x9A54, 0xE302, 0xD495, 0xADC3, 0x2639, 0x5F6F,
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0x4917, 0x3041, 0xBBBB, 0xC2ED, 0xF57A, 0x8C2C, 0x07D6, 0x7E80,
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0xFAD7, 0x8381, 0x087B, 0x712D, 0x46BA, 0x3FEC, 0xB416, 0xCD40,
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0xDB38, 0xA26E, 0x2994, 0x50C2, 0x6755, 0x1E03, 0x95F9, 0xECAF,
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0xB909, 0xC05F, 0x4BA5, 0x32F3, 0x0564, 0x7C32, 0xF7C8, 0x8E9E,
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0x98E6, 0xE1B0, 0x6A4A, 0x131C, 0x248B, 0x5DDD, 0xD627, 0xAF71,
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0x7D6B, 0x043D, 0x8FC7, 0xF691, 0xC106, 0xB850, 0x33AA, 0x4AFC,
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0x5C84, 0x25D2, 0xAE28, 0xD77E, 0xE0E9, 0x99BF, 0x1245, 0x6B13,
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0x3EB5, 0x47E3, 0xCC19, 0xB54F, 0x82D8, 0xFB8E, 0x7074, 0x0922,
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0x1F5A, 0x660C, 0xEDF6, 0x94A0, 0xA337, 0xDA61, 0x519B, 0x28CD };
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/**
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* fm10k_crc_16b - Generate a 16 bit CRC for a region of 16 bit data
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* @data: pointer to data to process
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* @seed: seed value for CRC
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* @len: length measured in 16 bits words
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*
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* This function will generate a CRC based on the polynomial 0xAC9A and
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* whatever value is stored in the seed variable. Note that this
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* value inverts the local seed and the result in order to capture all
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* leading and trailing zeros.
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*/
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static u16 fm10k_crc_16b(const u32 *data, u16 seed, u16 len)
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{
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u32 result = seed;
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while (len--) {
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result ^= *(data++);
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result = (result >> 8) ^ fm10k_crc_16b_table[result & 0xFF];
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result = (result >> 8) ^ fm10k_crc_16b_table[result & 0xFF];
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if (!(len--))
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break;
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result = (result >> 8) ^ fm10k_crc_16b_table[result & 0xFF];
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result = (result >> 8) ^ fm10k_crc_16b_table[result & 0xFF];
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}
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return (u16)result;
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}
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/**
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* fm10k_fifo_crc - generate a CRC based off of FIFO data
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* @fifo: pointer to FIFO
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* @offset: offset point for start of FIFO
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* @len: number of DWORDS words to process
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* @seed: seed value for CRC
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*
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* This function generates a CRC for some region of the FIFO
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**/
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static u16 fm10k_fifo_crc(struct fm10k_mbx_fifo *fifo, u16 offset,
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u16 len, u16 seed)
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{
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u32 *data = fifo->buffer + offset;
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/* track when we should cross the end of the FIFO */
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offset = fifo->size - offset;
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/* if we are in 2 blocks process the end of the FIFO first */
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if (offset < len) {
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seed = fm10k_crc_16b(data, seed, offset * 2);
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data = fifo->buffer;
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len -= offset;
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}
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/* process any remaining bits */
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return fm10k_crc_16b(data, seed, len * 2);
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}
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/**
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* fm10k_mbx_update_local_crc - Update the local CRC for outgoing data
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* @mbx: pointer to mailbox
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* @head: head index provided by remote mailbox
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*
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* This function will generate the CRC for all data from the end of the
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* last head update to the current one. It uses the result of the
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* previous CRC as the seed for this update. The result is stored in
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* mbx->local.
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**/
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static void fm10k_mbx_update_local_crc(struct fm10k_mbx_info *mbx, u16 head)
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{
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u16 len = mbx->tail_len - fm10k_mbx_index_len(mbx, head, mbx->tail);
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/* determine the offset for the start of the region to be pulled */
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head = fm10k_fifo_head_offset(&mbx->tx, mbx->pulled);
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/* update local CRC to include all of the pulled data */
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mbx->local = fm10k_fifo_crc(&mbx->tx, head, len, mbx->local);
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}
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/**
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* fm10k_mbx_verify_remote_crc - Verify the CRC is correct for current data
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* @mbx: pointer to mailbox
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*
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* This function will take all data that has been provided from the remote
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* end and generate a CRC for it. This is stored in mbx->remote. The
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* CRC for the header is then computed and if the result is non-zero this
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* is an error and we signal an error dropping all data and resetting the
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* connection.
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*/
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static s32 fm10k_mbx_verify_remote_crc(struct fm10k_mbx_info *mbx)
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{
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struct fm10k_mbx_fifo *fifo = &mbx->rx;
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u16 len = mbx->head_len;
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u16 offset = fm10k_fifo_tail_offset(fifo, mbx->pushed) - len;
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u16 crc;
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/* update the remote CRC if new data has been received */
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if (len)
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mbx->remote = fm10k_fifo_crc(fifo, offset, len, mbx->remote);
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/* process the full header as we have to validate the CRC */
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crc = fm10k_crc_16b(&mbx->mbx_hdr, mbx->remote, 1);
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/* notify other end if we have a problem */
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return crc ? FM10K_MBX_ERR_CRC : 0;
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}
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/**
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* fm10k_mbx_rx_ready - Indicates that a message is ready in the Rx FIFO
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* @mbx: pointer to mailbox
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@ -685,6 +827,204 @@ static void fm10k_mbx_write(struct fm10k_hw *hw, struct fm10k_mbx_info *mbx)
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mbx->mbx_lock = 0;
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}
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/**
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* fm10k_mbx_create_connect_hdr - Generate a connect mailbox header
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* @mbx: pointer to mailbox
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*
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* This function returns a connection mailbox header
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**/
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static void fm10k_mbx_create_connect_hdr(struct fm10k_mbx_info *mbx)
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{
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mbx->mbx_lock |= FM10K_MBX_REQ;
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mbx->mbx_hdr = FM10K_MSG_HDR_FIELD_SET(FM10K_MSG_CONNECT, TYPE) |
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FM10K_MSG_HDR_FIELD_SET(mbx->head, HEAD) |
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FM10K_MSG_HDR_FIELD_SET(mbx->rx.size - 1, CONNECT_SIZE);
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}
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/**
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* fm10k_mbx_create_data_hdr - Generate a data mailbox header
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* @mbx: pointer to mailbox
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*
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* This function returns a data mailbox header
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**/
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static void fm10k_mbx_create_data_hdr(struct fm10k_mbx_info *mbx)
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{
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u32 hdr = FM10K_MSG_HDR_FIELD_SET(FM10K_MSG_DATA, TYPE) |
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FM10K_MSG_HDR_FIELD_SET(mbx->tail, TAIL) |
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FM10K_MSG_HDR_FIELD_SET(mbx->head, HEAD);
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struct fm10k_mbx_fifo *fifo = &mbx->tx;
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u16 crc;
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if (mbx->tail_len)
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mbx->mbx_lock |= FM10K_MBX_REQ;
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/* generate CRC for data in flight and header */
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crc = fm10k_fifo_crc(fifo, fm10k_fifo_head_offset(fifo, mbx->pulled),
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mbx->tail_len, mbx->local);
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crc = fm10k_crc_16b(&hdr, crc, 1);
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/* load header to memory to be written */
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mbx->mbx_hdr = hdr | FM10K_MSG_HDR_FIELD_SET(crc, CRC);
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}
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/**
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* fm10k_mbx_create_disconnect_hdr - Generate a disconnect mailbox header
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* @mbx: pointer to mailbox
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*
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* This function returns a disconnect mailbox header
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**/
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static void fm10k_mbx_create_disconnect_hdr(struct fm10k_mbx_info *mbx)
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{
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u32 hdr = FM10K_MSG_HDR_FIELD_SET(FM10K_MSG_DISCONNECT, TYPE) |
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FM10K_MSG_HDR_FIELD_SET(mbx->tail, TAIL) |
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FM10K_MSG_HDR_FIELD_SET(mbx->head, HEAD);
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u16 crc = fm10k_crc_16b(&hdr, mbx->local, 1);
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mbx->mbx_lock |= FM10K_MBX_ACK;
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/* load header to memory to be written */
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mbx->mbx_hdr = hdr | FM10K_MSG_HDR_FIELD_SET(crc, CRC);
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}
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/**
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* fm10k_mbx_create_error_msg - Generate a error message
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* @mbx: pointer to mailbox
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* @err: local error encountered
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*
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* This function will interpret the error provided by err, and based on
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* that it may shift the message by 1 DWORD and then place an error header
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* at the start of the message.
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**/
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static void fm10k_mbx_create_error_msg(struct fm10k_mbx_info *mbx, s32 err)
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{
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/* only generate an error message for these types */
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switch (err) {
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case FM10K_MBX_ERR_TAIL:
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case FM10K_MBX_ERR_HEAD:
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case FM10K_MBX_ERR_TYPE:
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case FM10K_MBX_ERR_SIZE:
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case FM10K_MBX_ERR_RSVD0:
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case FM10K_MBX_ERR_CRC:
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break;
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default:
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return;
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}
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mbx->mbx_lock |= FM10K_MBX_REQ;
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mbx->mbx_hdr = FM10K_MSG_HDR_FIELD_SET(FM10K_MSG_ERROR, TYPE) |
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FM10K_MSG_HDR_FIELD_SET(err, ERR_NO) |
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FM10K_MSG_HDR_FIELD_SET(mbx->head, HEAD);
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}
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/**
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* fm10k_mbx_validate_msg_hdr - Validate common fields in the message header
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* @mbx: pointer to mailbox
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* @msg: message array to read
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*
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* This function will parse up the fields in the mailbox header and return
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* an error if the header contains any of a number of invalid configurations
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* including unrecognized type, invalid route, or a malformed message.
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**/
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static s32 fm10k_mbx_validate_msg_hdr(struct fm10k_mbx_info *mbx)
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{
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u16 type, rsvd0, head, tail, size;
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const u32 *hdr = &mbx->mbx_hdr;
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type = FM10K_MSG_HDR_FIELD_GET(*hdr, TYPE);
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rsvd0 = FM10K_MSG_HDR_FIELD_GET(*hdr, RSVD0);
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tail = FM10K_MSG_HDR_FIELD_GET(*hdr, TAIL);
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head = FM10K_MSG_HDR_FIELD_GET(*hdr, HEAD);
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size = FM10K_MSG_HDR_FIELD_GET(*hdr, CONNECT_SIZE);
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if (rsvd0)
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return FM10K_MBX_ERR_RSVD0;
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switch (type) {
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case FM10K_MSG_DISCONNECT:
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/* validate that all data has been received */
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if (tail != mbx->head)
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return FM10K_MBX_ERR_TAIL;
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/* fall through */
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case FM10K_MSG_DATA:
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/* validate that head is moving correctly */
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if (!head || (head == FM10K_MSG_HDR_MASK(HEAD)))
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return FM10K_MBX_ERR_HEAD;
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if (fm10k_mbx_index_len(mbx, head, mbx->tail) > mbx->tail_len)
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return FM10K_MBX_ERR_HEAD;
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/* validate that tail is moving correctly */
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if (!tail || (tail == FM10K_MSG_HDR_MASK(TAIL)))
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return FM10K_MBX_ERR_TAIL;
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if (fm10k_mbx_index_len(mbx, mbx->head, tail) < mbx->mbmem_len)
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break;
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return FM10K_MBX_ERR_TAIL;
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case FM10K_MSG_CONNECT:
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/* validate size is in range and is power of 2 mask */
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if ((size < FM10K_VFMBX_MSG_MTU) || (size & (size + 1)))
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return FM10K_MBX_ERR_SIZE;
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/* fall through */
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case FM10K_MSG_ERROR:
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if (!head || (head == FM10K_MSG_HDR_MASK(HEAD)))
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return FM10K_MBX_ERR_HEAD;
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/* neither create nor error include a tail offset */
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if (tail)
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return FM10K_MBX_ERR_TAIL;
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break;
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default:
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return FM10K_MBX_ERR_TYPE;
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}
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return 0;
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}
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/**
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* fm10k_mbx_create_reply - Generate reply based on state and remote head
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* @mbx: pointer to mailbox
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* @head: acknowledgement number
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*
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* This function will generate an outgoing message based on the current
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* mailbox state and the remote fifo head. It will return the length
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* of the outgoing message excluding header on success, and a negative value
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* on error.
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**/
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static s32 fm10k_mbx_create_reply(struct fm10k_hw *hw,
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struct fm10k_mbx_info *mbx, u16 head)
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{
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switch (mbx->state) {
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case FM10K_STATE_OPEN:
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case FM10K_STATE_DISCONNECT:
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/* update our checksum for the outgoing data */
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fm10k_mbx_update_local_crc(mbx, head);
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/* as long as other end recognizes us keep sending data */
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fm10k_mbx_pull_head(hw, mbx, head);
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/* generate new header based on data */
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if (mbx->tail_len || (mbx->state == FM10K_STATE_OPEN))
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fm10k_mbx_create_data_hdr(mbx);
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else
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fm10k_mbx_create_disconnect_hdr(mbx);
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break;
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case FM10K_STATE_CONNECT:
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/* send disconnect even if we aren't connected */
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fm10k_mbx_create_connect_hdr(mbx);
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break;
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case FM10K_STATE_CLOSED:
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/* generate new header based on data */
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fm10k_mbx_create_disconnect_hdr(mbx);
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default:
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break;
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}
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return 0;
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}
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/**
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* fm10k_mbx_reset_work- Reset internal pointers for any pending work
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* @mbx: pointer to mailbox
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@ -730,6 +1070,359 @@ static void fm10k_mbx_update_max_size(struct fm10k_mbx_info *mbx, u16 size)
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}
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}
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/**
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* fm10k_mbx_connect_reset - Reset following request for reset
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* @mbx: pointer to mailbox
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*
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* This function resets the mailbox to either a disconnected state
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* or a connect state depending on the current mailbox state
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**/
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static void fm10k_mbx_connect_reset(struct fm10k_mbx_info *mbx)
|
||||
{
|
||||
/* just do a quick resysnc to start of frame */
|
||||
fm10k_mbx_reset_work(mbx);
|
||||
|
||||
/* reset CRC seeds */
|
||||
mbx->local = FM10K_MBX_CRC_SEED;
|
||||
mbx->remote = FM10K_MBX_CRC_SEED;
|
||||
|
||||
/* we cannot exit connect until the size is good */
|
||||
if (mbx->state == FM10K_STATE_OPEN)
|
||||
mbx->state = FM10K_STATE_CONNECT;
|
||||
else
|
||||
mbx->state = FM10K_STATE_CLOSED;
|
||||
}
|
||||
|
||||
/**
|
||||
* fm10k_mbx_process_connect - Process connect header
|
||||
* @mbx: pointer to mailbox
|
||||
* @msg: message array to process
|
||||
*
|
||||
* This function will read an incoming connect header and reply with the
|
||||
* appropriate message. It will return a value indicating the number of
|
||||
* data DWORDs on success, or will return a negative value on failure.
|
||||
**/
|
||||
static s32 fm10k_mbx_process_connect(struct fm10k_hw *hw,
|
||||
struct fm10k_mbx_info *mbx)
|
||||
{
|
||||
const enum fm10k_mbx_state state = mbx->state;
|
||||
const u32 *hdr = &mbx->mbx_hdr;
|
||||
u16 size, head;
|
||||
|
||||
/* we will need to pull all of the fields for verification */
|
||||
size = FM10K_MSG_HDR_FIELD_GET(*hdr, CONNECT_SIZE);
|
||||
head = FM10K_MSG_HDR_FIELD_GET(*hdr, HEAD);
|
||||
|
||||
switch (state) {
|
||||
case FM10K_STATE_DISCONNECT:
|
||||
case FM10K_STATE_OPEN:
|
||||
/* reset any in-progress work */
|
||||
fm10k_mbx_connect_reset(mbx);
|
||||
break;
|
||||
case FM10K_STATE_CONNECT:
|
||||
/* we cannot exit connect until the size is good */
|
||||
if (size > mbx->rx.size) {
|
||||
mbx->max_size = mbx->rx.size - 1;
|
||||
} else {
|
||||
/* record the remote system requesting connection */
|
||||
mbx->state = FM10K_STATE_OPEN;
|
||||
|
||||
fm10k_mbx_update_max_size(mbx, size);
|
||||
}
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
/* align our tail index to remote head index */
|
||||
mbx->tail = head;
|
||||
|
||||
return fm10k_mbx_create_reply(hw, mbx, head);
|
||||
}
|
||||
|
||||
/**
|
||||
* fm10k_mbx_process_data - Process data header
|
||||
* @mbx: pointer to mailbox
|
||||
*
|
||||
* This function will read an incoming data header and reply with the
|
||||
* appropriate message. It will return a value indicating the number of
|
||||
* data DWORDs on success, or will return a negative value on failure.
|
||||
**/
|
||||
static s32 fm10k_mbx_process_data(struct fm10k_hw *hw,
|
||||
struct fm10k_mbx_info *mbx)
|
||||
{
|
||||
const u32 *hdr = &mbx->mbx_hdr;
|
||||
u16 head, tail;
|
||||
s32 err;
|
||||
|
||||
/* we will need to pull all of the fields for verification */
|
||||
head = FM10K_MSG_HDR_FIELD_GET(*hdr, HEAD);
|
||||
tail = FM10K_MSG_HDR_FIELD_GET(*hdr, TAIL);
|
||||
|
||||
/* if we are in connect just update our data and go */
|
||||
if (mbx->state == FM10K_STATE_CONNECT) {
|
||||
mbx->tail = head;
|
||||
mbx->state = FM10K_STATE_OPEN;
|
||||
}
|
||||
|
||||
/* abort on message size errors */
|
||||
err = fm10k_mbx_push_tail(hw, mbx, tail);
|
||||
if (err < 0)
|
||||
return err;
|
||||
|
||||
/* verify the checksum on the incoming data */
|
||||
err = fm10k_mbx_verify_remote_crc(mbx);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
/* process messages if we have received any */
|
||||
fm10k_mbx_dequeue_rx(hw, mbx);
|
||||
|
||||
return fm10k_mbx_create_reply(hw, mbx, head);
|
||||
}
|
||||
|
||||
/**
|
||||
* fm10k_mbx_process_disconnect - Process disconnect header
|
||||
* @mbx: pointer to mailbox
|
||||
*
|
||||
* This function will read an incoming disconnect header and reply with the
|
||||
* appropriate message. It will return a value indicating the number of
|
||||
* data DWORDs on success, or will return a negative value on failure.
|
||||
**/
|
||||
static s32 fm10k_mbx_process_disconnect(struct fm10k_hw *hw,
|
||||
struct fm10k_mbx_info *mbx)
|
||||
{
|
||||
const enum fm10k_mbx_state state = mbx->state;
|
||||
const u32 *hdr = &mbx->mbx_hdr;
|
||||
u16 head, tail;
|
||||
s32 err;
|
||||
|
||||
/* we will need to pull all of the fields for verification */
|
||||
head = FM10K_MSG_HDR_FIELD_GET(*hdr, HEAD);
|
||||
tail = FM10K_MSG_HDR_FIELD_GET(*hdr, TAIL);
|
||||
|
||||
/* We should not be receiving disconnect if Rx is incomplete */
|
||||
if (mbx->pushed)
|
||||
return FM10K_MBX_ERR_TAIL;
|
||||
|
||||
/* we have already verified mbx->head == tail so we know this is 0 */
|
||||
mbx->head_len = 0;
|
||||
|
||||
/* verify the checksum on the incoming header is correct */
|
||||
err = fm10k_mbx_verify_remote_crc(mbx);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
switch (state) {
|
||||
case FM10K_STATE_DISCONNECT:
|
||||
case FM10K_STATE_OPEN:
|
||||
/* state doesn't change if we still have work to do */
|
||||
if (!fm10k_mbx_tx_complete(mbx))
|
||||
break;
|
||||
|
||||
/* verify the head indicates we completed all transmits */
|
||||
if (head != mbx->tail)
|
||||
return FM10K_MBX_ERR_HEAD;
|
||||
|
||||
/* reset any in-progress work */
|
||||
fm10k_mbx_connect_reset(mbx);
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
return fm10k_mbx_create_reply(hw, mbx, head);
|
||||
}
|
||||
|
||||
/**
|
||||
* fm10k_mbx_process_error - Process error header
|
||||
* @mbx: pointer to mailbox
|
||||
*
|
||||
* This function will read an incoming error header and reply with the
|
||||
* appropriate message. It will return a value indicating the number of
|
||||
* data DWORDs on success, or will return a negative value on failure.
|
||||
**/
|
||||
static s32 fm10k_mbx_process_error(struct fm10k_hw *hw,
|
||||
struct fm10k_mbx_info *mbx)
|
||||
{
|
||||
const u32 *hdr = &mbx->mbx_hdr;
|
||||
s32 err_no;
|
||||
u16 head;
|
||||
|
||||
/* we will need to pull all of the fields for verification */
|
||||
head = FM10K_MSG_HDR_FIELD_GET(*hdr, HEAD);
|
||||
|
||||
/* we only have lower 10 bits of error number os add upper bits */
|
||||
err_no = FM10K_MSG_HDR_FIELD_GET(*hdr, ERR_NO);
|
||||
err_no |= ~FM10K_MSG_HDR_MASK(ERR_NO);
|
||||
|
||||
switch (mbx->state) {
|
||||
case FM10K_STATE_OPEN:
|
||||
case FM10K_STATE_DISCONNECT:
|
||||
/* flush any uncompleted work */
|
||||
fm10k_mbx_reset_work(mbx);
|
||||
|
||||
/* reset CRC seeds */
|
||||
mbx->local = FM10K_MBX_CRC_SEED;
|
||||
mbx->remote = FM10K_MBX_CRC_SEED;
|
||||
|
||||
/* reset tail index and size to prepare for reconnect */
|
||||
mbx->tail = head;
|
||||
|
||||
/* if open then reset max_size and go back to connect */
|
||||
if (mbx->state == FM10K_STATE_OPEN) {
|
||||
mbx->state = FM10K_STATE_CONNECT;
|
||||
break;
|
||||
}
|
||||
|
||||
/* send a connect message to get data flowing again */
|
||||
fm10k_mbx_create_connect_hdr(mbx);
|
||||
return 0;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
return fm10k_mbx_create_reply(hw, mbx, mbx->tail);
|
||||
}
|
||||
|
||||
/**
|
||||
* fm10k_mbx_process - Process mailbox interrupt
|
||||
* @hw: pointer to hardware structure
|
||||
* @mbx: pointer to mailbox
|
||||
*
|
||||
* This function will process incoming mailbox events and generate mailbox
|
||||
* replies. It will return a value indicating the number of DWORDs
|
||||
* transmitted excluding header on success or a negative value on error.
|
||||
**/
|
||||
static s32 fm10k_mbx_process(struct fm10k_hw *hw,
|
||||
struct fm10k_mbx_info *mbx)
|
||||
{
|
||||
s32 err;
|
||||
|
||||
/* we do not read mailbox if closed */
|
||||
if (mbx->state == FM10K_STATE_CLOSED)
|
||||
return 0;
|
||||
|
||||
/* copy data from mailbox */
|
||||
err = fm10k_mbx_read(hw, mbx);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
/* validate type, source, and destination */
|
||||
err = fm10k_mbx_validate_msg_hdr(mbx);
|
||||
if (err < 0)
|
||||
goto msg_err;
|
||||
|
||||
switch (FM10K_MSG_HDR_FIELD_GET(mbx->mbx_hdr, TYPE)) {
|
||||
case FM10K_MSG_CONNECT:
|
||||
err = fm10k_mbx_process_connect(hw, mbx);
|
||||
break;
|
||||
case FM10K_MSG_DATA:
|
||||
err = fm10k_mbx_process_data(hw, mbx);
|
||||
break;
|
||||
case FM10K_MSG_DISCONNECT:
|
||||
err = fm10k_mbx_process_disconnect(hw, mbx);
|
||||
break;
|
||||
case FM10K_MSG_ERROR:
|
||||
err = fm10k_mbx_process_error(hw, mbx);
|
||||
break;
|
||||
default:
|
||||
err = FM10K_MBX_ERR_TYPE;
|
||||
break;
|
||||
}
|
||||
|
||||
msg_err:
|
||||
/* notify partner of errors on our end */
|
||||
if (err < 0)
|
||||
fm10k_mbx_create_error_msg(mbx, err);
|
||||
|
||||
/* copy data from mailbox */
|
||||
fm10k_mbx_write(hw, mbx);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
/**
|
||||
* fm10k_mbx_disconnect - Shutdown mailbox connection
|
||||
* @hw: pointer to hardware structure
|
||||
* @mbx: pointer to mailbox
|
||||
*
|
||||
* This function will shut down the mailbox. It places the mailbox first
|
||||
* in the disconnect state, it then allows up to a predefined timeout for
|
||||
* the mailbox to transition to close on its own. If this does not occur
|
||||
* then the mailbox will be forced into the closed state.
|
||||
*
|
||||
* Any mailbox transactions not completed before calling this function
|
||||
* are not guaranteed to complete and may be dropped.
|
||||
**/
|
||||
static void fm10k_mbx_disconnect(struct fm10k_hw *hw,
|
||||
struct fm10k_mbx_info *mbx)
|
||||
{
|
||||
int timeout = mbx->timeout ? FM10K_MBX_DISCONNECT_TIMEOUT : 0;
|
||||
|
||||
/* Place mbx in ready to disconnect state */
|
||||
mbx->state = FM10K_STATE_DISCONNECT;
|
||||
|
||||
/* trigger interrupt to start shutdown process */
|
||||
fm10k_write_reg(hw, mbx->mbx_reg, FM10K_MBX_REQ |
|
||||
FM10K_MBX_INTERRUPT_DISABLE);
|
||||
do {
|
||||
udelay(FM10K_MBX_POLL_DELAY);
|
||||
mbx->ops.process(hw, mbx);
|
||||
timeout -= FM10K_MBX_POLL_DELAY;
|
||||
} while ((timeout > 0) && (mbx->state != FM10K_STATE_CLOSED));
|
||||
|
||||
/* in case we didn't close just force the mailbox into shutdown */
|
||||
fm10k_mbx_connect_reset(mbx);
|
||||
fm10k_mbx_update_max_size(mbx, 0);
|
||||
|
||||
fm10k_write_reg(hw, mbx->mbmem_reg, 0);
|
||||
}
|
||||
|
||||
/**
|
||||
* fm10k_mbx_connect - Start mailbox connection
|
||||
* @hw: pointer to hardware structure
|
||||
* @mbx: pointer to mailbox
|
||||
*
|
||||
* This function will initiate a mailbox connection. It will populate the
|
||||
* mailbox with a broadcast connect message and then initialize the lock.
|
||||
* This is safe since the connect message is a single DWORD so the mailbox
|
||||
* transaction is guaranteed to be atomic.
|
||||
*
|
||||
* This function will return an error if the mailbox has not been initiated
|
||||
* or is currently in use.
|
||||
**/
|
||||
static s32 fm10k_mbx_connect(struct fm10k_hw *hw, struct fm10k_mbx_info *mbx)
|
||||
{
|
||||
/* we cannot connect an uninitialized mailbox */
|
||||
if (!mbx->rx.buffer)
|
||||
return FM10K_MBX_ERR_NO_SPACE;
|
||||
|
||||
/* we cannot connect an already connected mailbox */
|
||||
if (mbx->state != FM10K_STATE_CLOSED)
|
||||
return FM10K_MBX_ERR_BUSY;
|
||||
|
||||
/* mailbox timeout can now become active */
|
||||
mbx->timeout = FM10K_MBX_INIT_TIMEOUT;
|
||||
|
||||
/* Place mbx in ready to connect state */
|
||||
mbx->state = FM10K_STATE_CONNECT;
|
||||
|
||||
/* initialize header of remote mailbox */
|
||||
fm10k_mbx_create_disconnect_hdr(mbx);
|
||||
fm10k_write_reg(hw, mbx->mbmem_reg ^ mbx->mbmem_len, mbx->mbx_hdr);
|
||||
|
||||
/* enable interrupt and notify other party of new message */
|
||||
mbx->mbx_lock = FM10K_MBX_REQ_INTERRUPT | FM10K_MBX_ACK_INTERRUPT |
|
||||
FM10K_MBX_INTERRUPT_ENABLE;
|
||||
|
||||
/* generate and load connect header into mailbox */
|
||||
fm10k_mbx_create_connect_hdr(mbx);
|
||||
fm10k_mbx_write(hw, mbx);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* fm10k_mbx_validate_handlers - Validate layout of message parsing data
|
||||
* @msg_data: handlers for mailbox events
|
||||
|
|
@ -805,6 +1498,83 @@ static s32 fm10k_mbx_register_handlers(struct fm10k_mbx_info *mbx,
|
|||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* fm10k_pfvf_mbx_init - Initialize mailbox memory for PF/VF mailbox
|
||||
* @hw: pointer to hardware structure
|
||||
* @mbx: pointer to mailbox
|
||||
* @msg_data: handlers for mailbox events
|
||||
* @id: ID reference for PF as it supports up to 64 PF/VF mailboxes
|
||||
*
|
||||
* This function initializes the mailbox for use. It will split the
|
||||
* buffer provided an use that th populate both the Tx and Rx FIFO by
|
||||
* evenly splitting it. In order to allow for easy masking of head/tail
|
||||
* the value reported in size must be a power of 2 and is reported in
|
||||
* DWORDs, not bytes. Any invalid values will cause the mailbox to return
|
||||
* error.
|
||||
**/
|
||||
s32 fm10k_pfvf_mbx_init(struct fm10k_hw *hw, struct fm10k_mbx_info *mbx,
|
||||
const struct fm10k_msg_data *msg_data, u8 id)
|
||||
{
|
||||
/* initialize registers */
|
||||
switch (hw->mac.type) {
|
||||
case fm10k_mac_pf:
|
||||
/* there are only 64 VF <-> PF mailboxes */
|
||||
if (id < 64) {
|
||||
mbx->mbx_reg = FM10K_MBX(id);
|
||||
mbx->mbmem_reg = FM10K_MBMEM_VF(id, 0);
|
||||
break;
|
||||
}
|
||||
/* fallthough */
|
||||
default:
|
||||
return FM10K_MBX_ERR_NO_MBX;
|
||||
}
|
||||
|
||||
/* start out in closed state */
|
||||
mbx->state = FM10K_STATE_CLOSED;
|
||||
|
||||
/* validate layout of handlers before assigning them */
|
||||
if (fm10k_mbx_validate_handlers(msg_data))
|
||||
return FM10K_ERR_PARAM;
|
||||
|
||||
/* initialize the message handlers */
|
||||
mbx->msg_data = msg_data;
|
||||
|
||||
/* start mailbox as timed out and let the reset_hw call
|
||||
* set the timeout value to begin communications
|
||||
*/
|
||||
mbx->timeout = 0;
|
||||
mbx->udelay = FM10K_MBX_INIT_DELAY;
|
||||
|
||||
/* initalize tail and head */
|
||||
mbx->tail = 1;
|
||||
mbx->head = 1;
|
||||
|
||||
/* initialize CRC seeds */
|
||||
mbx->local = FM10K_MBX_CRC_SEED;
|
||||
mbx->remote = FM10K_MBX_CRC_SEED;
|
||||
|
||||
/* Split buffer for use by Tx/Rx FIFOs */
|
||||
mbx->max_size = FM10K_MBX_MSG_MAX_SIZE;
|
||||
mbx->mbmem_len = FM10K_VFMBMEM_VF_XOR;
|
||||
|
||||
/* initialize the FIFOs, sizes are in 4 byte increments */
|
||||
fm10k_fifo_init(&mbx->tx, mbx->buffer, FM10K_MBX_TX_BUFFER_SIZE);
|
||||
fm10k_fifo_init(&mbx->rx, &mbx->buffer[FM10K_MBX_TX_BUFFER_SIZE],
|
||||
FM10K_MBX_RX_BUFFER_SIZE);
|
||||
|
||||
/* initialize function pointers */
|
||||
mbx->ops.connect = fm10k_mbx_connect;
|
||||
mbx->ops.disconnect = fm10k_mbx_disconnect;
|
||||
mbx->ops.rx_ready = fm10k_mbx_rx_ready;
|
||||
mbx->ops.tx_ready = fm10k_mbx_tx_ready;
|
||||
mbx->ops.tx_complete = fm10k_mbx_tx_complete;
|
||||
mbx->ops.enqueue_tx = fm10k_mbx_enqueue_tx;
|
||||
mbx->ops.process = fm10k_mbx_process;
|
||||
mbx->ops.register_handlers = fm10k_mbx_register_handlers;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* fm10k_sm_mbx_create_data_hdr - Generate a mailbox header for local FIFO
|
||||
* @mbx: pointer to mailbox
|
||||
|
|
|
|||
|
|
@ -99,6 +99,39 @@ enum fm10k_mbx_state {
|
|||
FM10K_STATE_DISCONNECT,
|
||||
};
|
||||
|
||||
/* PF/VF Mailbox header format
|
||||
* 3 2 1 0
|
||||
* 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
* | Size/Err_no/CRC | Rsvd0 | Head | Tail | Type |
|
||||
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||
*
|
||||
* The layout above describes the format for the header used in the PF/VF
|
||||
* mailbox. The header is broken out into the following fields:
|
||||
* Type: There are 4 supported message types
|
||||
* 0x8: Data header - used to transport message data
|
||||
* 0xC: Connect header - used to establish connection
|
||||
* 0xD: Disconnect header - used to tear down a connection
|
||||
* 0xE: Error header - used to address message exceptions
|
||||
* Tail: Tail index for local FIFO
|
||||
* Tail index actually consists of two parts. The MSB of
|
||||
* the head is a loop tracker, it is 0 on an even numbered
|
||||
* loop through the FIFO, and 1 on the odd numbered loops.
|
||||
* To get the actual mailbox offset based on the tail it
|
||||
* is necessary to add bit 3 to bit 0 and clear bit 3. This
|
||||
* gives us a valid range of 0x1 - 0xE.
|
||||
* Head: Head index for remote FIFO
|
||||
* Head index follows the same format as the tail index.
|
||||
* Rsvd0: Reserved 0 portion of the mailbox header
|
||||
* CRC: Running CRC for all data since connect plus current message header
|
||||
* Size: Maximum message size - Applies only to connect headers
|
||||
* The maximum message size is provided during connect to avoid
|
||||
* jamming the mailbox with messages that do not fit.
|
||||
* Err_no: Error number - Applies only to error headers
|
||||
* The error number provides a indication of the type of error
|
||||
* experienced.
|
||||
*/
|
||||
|
||||
/* macros for retriving and setting header values */
|
||||
#define FM10K_MSG_HDR_MASK(name) \
|
||||
((0x1u << FM10K_MSG_##name##_SIZE) - 1)
|
||||
|
|
@ -107,6 +140,35 @@ enum fm10k_mbx_state {
|
|||
#define FM10K_MSG_HDR_FIELD_GET(value, name) \
|
||||
((u16)((value) >> FM10K_MSG_##name##_SHIFT) & FM10K_MSG_HDR_MASK(name))
|
||||
|
||||
/* offsets shared between all headers */
|
||||
#define FM10K_MSG_TYPE_SHIFT 0
|
||||
#define FM10K_MSG_TYPE_SIZE 4
|
||||
#define FM10K_MSG_TAIL_SHIFT 4
|
||||
#define FM10K_MSG_TAIL_SIZE 4
|
||||
#define FM10K_MSG_HEAD_SHIFT 8
|
||||
#define FM10K_MSG_HEAD_SIZE 4
|
||||
#define FM10K_MSG_RSVD0_SHIFT 12
|
||||
#define FM10K_MSG_RSVD0_SIZE 4
|
||||
|
||||
/* offsets for data/disconnect headers */
|
||||
#define FM10K_MSG_CRC_SHIFT 16
|
||||
#define FM10K_MSG_CRC_SIZE 16
|
||||
|
||||
/* offsets for connect headers */
|
||||
#define FM10K_MSG_CONNECT_SIZE_SHIFT 16
|
||||
#define FM10K_MSG_CONNECT_SIZE_SIZE 16
|
||||
|
||||
/* offsets for error headers */
|
||||
#define FM10K_MSG_ERR_NO_SHIFT 16
|
||||
#define FM10K_MSG_ERR_NO_SIZE 16
|
||||
|
||||
enum fm10k_msg_type {
|
||||
FM10K_MSG_DATA = 0x8,
|
||||
FM10K_MSG_CONNECT = 0xC,
|
||||
FM10K_MSG_DISCONNECT = 0xD,
|
||||
FM10K_MSG_ERROR = 0xE,
|
||||
};
|
||||
|
||||
/* HNI/SM Mailbox FIFO format
|
||||
* 3 2 1 0
|
||||
* 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
|
||||
|
|
@ -237,6 +299,8 @@ struct fm10k_mbx_info {
|
|||
u32 buffer[FM10K_MBX_BUFFER_SIZE];
|
||||
};
|
||||
|
||||
s32 fm10k_pfvf_mbx_init(struct fm10k_hw *, struct fm10k_mbx_info *,
|
||||
const struct fm10k_msg_data *, u8);
|
||||
s32 fm10k_sm_mbx_init(struct fm10k_hw *, struct fm10k_mbx_info *,
|
||||
const struct fm10k_msg_data *);
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue