bslathi19/taxi
1
0
Fork 0
mirror of https://github.com/fpganinja/taxi.git synced 2026-04-08 13:08:42 -07:00
Code Issues Packages Projects Releases Wiki Activity

cndm: Add consumer pointer and arm bit to completion queue

Browse Source 
Signed-off-by: Alex Forencich <alex@alexforencich.com>
This commit is contained in:
Alex Forencich
2026-03-09 14:50:07 -07:00
parent e514869d70
commit c37d967de9
10 changed files with 156 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files

43
src/cndm/tb/cndm.py
View File

@@ -89,7 +89,6 @@ class Cq:
self.cons_ptr = None
self.db_offset = None
self.hw_regs = self.driver.hw_regs
async def open(self, irqn, size):
@@ -141,7 +140,10 @@ class Cq:
self.log.error("Failed to allocate CQ")
return
await self.write_cons_ptr_arm()
self.log.info("Opened CQ %d", self.cqn)
self.log.info("Using doorbell at offset 0x%08x", self.db_offset)
self.enabled = True
@@ -173,6 +175,12 @@ class Cq:
# TODO free buffer
async def write_cons_ptr(self):
await self.hw_regs.write_dword(self.db_offset, self.cons_ptr & 0xffff)
async def write_cons_ptr_arm(self):
await self.hw_regs.write_dword(self.db_offset, (self.cons_ptr & 0xffff) | 0x80000000)
class Sq:
def __init__(self, driver, port):
@@ -203,7 +211,6 @@ class Sq:
self.bytes = 0
self.db_offset = None
self.hw_regs = self.driver.hw_regs
async def open(self, cq, size):
@@ -261,6 +268,7 @@ class Sq:
return
self.log.info("Opened SQ %d (CQ %d)", self.sqn, cq.cqn)
self.log.info("Using doorbell at offset 0x%08x", self.db_offset)
self.enabled = True
@@ -292,6 +300,15 @@ class Sq:
# TODO free buffer
def is_ring_empty(self):
return self.prod_ptr == self.cons_ptr
def is_ring_full(self):
return ((self.prod_ptr - self.cons_ptr) & 0xffffffff) > self.size
async def write_prod_ptr(self):
await self.hw_regs.write_dword(self.db_offset, self.prod_ptr & 0xffff)
async def start_xmit(self, data):
headroom = 10
tx_buf = self.driver.alloc_pkt()
@@ -301,7 +318,7 @@ class Sq:
struct.pack_into('<xxxxLQ', self.buf, 16*index, len(data), ptr+headroom)
self.tx_info[index] = tx_buf
self.prod_ptr += 1
await self.hw_regs.write_dword(self.db_offset, self.prod_ptr & 0xffff)
await self.write_prod_ptr()
def free_tx_desc(self, index):
pkt = self.tx_info[index]
@@ -309,7 +326,7 @@ class Sq:
self.tx_info[index] = None
def free_tx_buf(self):
while self.cons_ptr != self.txq_prod:
while not self.is_ring_empty():
index = self.cons_ptr & self.size_mask
self.free_tx_desc(index)
self.cons_ptr += 1
@@ -345,6 +362,8 @@ class Sq:
cq.cons_ptr = cq_cons_ptr
sq.cons_ptr = cons_ptr
await cq.write_cons_ptr_arm()
class Rq:
def __init__(self, driver, port):
@@ -375,7 +394,6 @@ class Rq:
self.bytes = 0
self.db_offset = None
self.hw_regs = self.driver.hw_regs
async def open(self, cq, size):
@@ -433,6 +451,7 @@ class Rq:
return
self.log.info("Opened RQ %d (CQ %d)", self.rqn, cq.cqn)
self.log.info("Using doorbell at offset 0x%08x", self.db_offset)
self.enabled = True
@@ -466,13 +485,22 @@ class Rq:
# TODO free buffer
def is_ring_empty(self):
return self.prod_ptr == self.cons_ptr
def is_ring_full(self):
return ((self.prod_ptr - self.cons_ptr) & 0xffffffff) > self.size
async def write_prod_ptr(self):
await self.hw_regs.write_dword(self.db_offset, self.prod_ptr & 0xffff)
def free_rx_desc(self, index):
pkt = self.rx_info[index]
self.driver.free_pkt(pkt)
self.rx_info[index] = None
def free_rx_buf(self):
while self.cons_ptr != self.prod_ptr:
while not self.is_ring_empty():
index = self.cons_ptr & self.size_mask
self.free_rx_desc(index)
self.cons_ptr += 1
@@ -496,7 +524,7 @@ class Rq:
self.prepare_rx_desc(self.prod_ptr & self.size_mask)
self.prod_ptr += 1
await self.hw_regs.write_dword(self.db_offset, self.prod_ptr & 0xffff)
await self.write_prod_ptr()
@staticmethod
async def process_rx_cq(cq):
@@ -537,6 +565,7 @@ class Rq:
rq.cons_ptr = cons_ptr
await rq.refill_rx_buffers()
await cq.write_cons_ptr_arm()
class Port: