[PATCH net-next 6/9] net: ipa: use a bitmap for available endpoints
From: Alex Elder
Date: Sat Oct 29 2022 - 20:19:08 EST
Similar to the previous patch, replace the 32-bit unsigned used to
track endpoints supported by hardware with a Linux bitmap, to allow
an arbitrary number of endpoints to be represented.
Signed-off-by: Alex Elder <elder@xxxxxxxxxx>
---
drivers/net/ipa/ipa.h | 8 +++---
drivers/net/ipa/ipa_endpoint.c | 44 +++++++++++++++++++++++----------
drivers/net/ipa/ipa_interrupt.c | 8 +++---
3 files changed, 41 insertions(+), 19 deletions(-)
diff --git a/drivers/net/ipa/ipa.h b/drivers/net/ipa/ipa.h
index 261c7263f9e31..c603575e2a58b 100644
--- a/drivers/net/ipa/ipa.h
+++ b/drivers/net/ipa/ipa.h
@@ -61,9 +61,10 @@ struct ipa_interrupt;
* @zero_addr: DMA address of preallocated zero-filled memory
* @zero_virt: Virtual address of preallocated zero-filled memory
* @zero_size: Size (bytes) of preallocated zero-filled memory
- * @endpoint_count: Number of endpoints represented by bit masks below
+ * @endpoint_count: Number of defined bits in most bitmaps below
+ * @available_count: Number of defined bits in the available bitmap
* @defined: Bitmap of endpoints defined in config data
- * @available: Bit mask indicating endpoints hardware supports
+ * @available: Bitmap of endpoints supported by hardware
* @filter_map: Bit mask indicating endpoints that support filtering
* @set_up: Bit mask indicating endpoints set up
* @enabled: Bit mask indicating endpoints enabled
@@ -119,8 +120,9 @@ struct ipa {
/* Bitmaps indicating endpoint state */
u32 endpoint_count;
+ u32 available_count;
unsigned long *defined; /* Defined in configuration data */
- u32 available; /* Supported by hardware */
+ unsigned long *available; /* Supported by hardware */
u32 filter_map;
u32 set_up;
u32 enabled;
diff --git a/drivers/net/ipa/ipa_endpoint.c b/drivers/net/ipa/ipa_endpoint.c
index 56908ee097cf6..8d4cb2c30ec90 100644
--- a/drivers/net/ipa/ipa_endpoint.c
+++ b/drivers/net/ipa/ipa_endpoint.c
@@ -351,19 +351,17 @@ ipa_endpoint_program_delay(struct ipa_endpoint *endpoint, bool enable)
static bool ipa_endpoint_aggr_active(struct ipa_endpoint *endpoint)
{
u32 endpoint_id = endpoint->endpoint_id;
- u32 mask = BIT(endpoint_id % 32);
struct ipa *ipa = endpoint->ipa;
u32 unit = endpoint_id / 32;
const struct ipa_reg *reg;
u32 val;
- /* This works until we actually have more than 32 endpoints */
- WARN_ON(!(mask & ipa->available));
+ WARN_ON(!test_bit(endpoint_id, ipa->available));
reg = ipa_reg(ipa, STATE_AGGR_ACTIVE);
val = ioread32(ipa->reg_virt + ipa_reg_n_offset(reg, unit));
- return !!(val & mask);
+ return !!(val & BIT(endpoint_id % 32));
}
static void ipa_endpoint_force_close(struct ipa_endpoint *endpoint)
@@ -374,8 +372,7 @@ static void ipa_endpoint_force_close(struct ipa_endpoint *endpoint)
u32 unit = endpoint_id / 32;
const struct ipa_reg *reg;
- /* This works until we actually have more than 32 endpoints */
- WARN_ON(!(mask & ipa->available));
+ WARN_ON(!test_bit(endpoint_id, ipa->available));
reg = ipa_reg(ipa, AGGR_FORCE_CLOSE);
iowrite32(mask, ipa->reg_virt + ipa_reg_n_offset(reg, unit));
@@ -1863,7 +1860,13 @@ int ipa_endpoint_config(struct ipa *ipa)
* assume the configuration is valid.
*/
if (ipa->version < IPA_VERSION_3_5) {
- ipa->available = ~0;
+ ipa->available = bitmap_zalloc(IPA_ENDPOINT_MAX, GFP_KERNEL);
+ if (!ipa->available)
+ return -ENOMEM;
+ ipa->available_count = IPA_ENDPOINT_MAX;
+
+ bitmap_set(ipa->available, 0, IPA_ENDPOINT_MAX);
+
return 0;
}
@@ -1885,8 +1888,15 @@ int ipa_endpoint_config(struct ipa *ipa)
return -EINVAL;
}
+ /* Allocate and initialize the available endpoint bitmap */
+ ipa->available = bitmap_zalloc(limit, GFP_KERNEL);
+ if (!ipa->available)
+ return -ENOMEM;
+ ipa->available_count = limit;
+
/* Mark all supported RX and TX endpoints as available */
- ipa->available = GENMASK(limit - 1, rx_base) | GENMASK(tx_count - 1, 0);
+ bitmap_set(ipa->available, 0, tx_count);
+ bitmap_set(ipa->available, rx_base, rx_count);
for_each_set_bit(endpoint_id, ipa->defined, ipa->endpoint_count) {
struct ipa_endpoint *endpoint;
@@ -1894,13 +1904,13 @@ int ipa_endpoint_config(struct ipa *ipa)
if (endpoint_id >= limit) {
dev_err(dev, "invalid endpoint id, %u > %u\n",
endpoint_id, limit - 1);
- return -EINVAL;
+ goto err_free_bitmap;
}
- if (!(BIT(endpoint_id) & ipa->available)) {
+ if (!test_bit(endpoint_id, ipa->available)) {
dev_err(dev, "unavailable endpoint id %u\n",
endpoint_id);
- return -EINVAL;
+ goto err_free_bitmap;
}
/* Make sure it's pointing in the right direction */
@@ -1913,15 +1923,23 @@ int ipa_endpoint_config(struct ipa *ipa)
}
dev_err(dev, "endpoint id %u wrong direction\n", endpoint_id);
- return -EINVAL;
+ goto err_free_bitmap;
}
return 0;
+
+err_free_bitmap:
+ bitmap_free(ipa->available);
+ ipa->available = NULL;
+
+ return -EINVAL;
}
void ipa_endpoint_deconfig(struct ipa *ipa)
{
- ipa->available = 0; /* Nothing more to do */
+ ipa->available_count = 0;
+ bitmap_free(ipa->available);
+ ipa->available = NULL;
}
static void ipa_endpoint_init_one(struct ipa *ipa, enum ipa_endpoint_name name,
diff --git a/drivers/net/ipa/ipa_interrupt.c b/drivers/net/ipa/ipa_interrupt.c
index a62bc667bda0e..a49f66efacb87 100644
--- a/drivers/net/ipa/ipa_interrupt.c
+++ b/drivers/net/ipa/ipa_interrupt.c
@@ -132,14 +132,13 @@ static void ipa_interrupt_suspend_control(struct ipa_interrupt *interrupt,
u32 endpoint_id, bool enable)
{
struct ipa *ipa = interrupt->ipa;
- u32 mask = BIT(endpoint_id % 32);
u32 unit = endpoint_id / 32;
const struct ipa_reg *reg;
u32 offset;
+ u32 mask;
u32 val;
- /* This works until we actually have more than 32 endpoints */
- WARN_ON(!(mask & ipa->available));
+ WARN_ON(!test_bit(endpoint_id, ipa->available));
/* IPA version 3.0 does not support TX_SUSPEND interrupt control */
if (ipa->version == IPA_VERSION_3_0)
@@ -148,10 +147,13 @@ static void ipa_interrupt_suspend_control(struct ipa_interrupt *interrupt,
reg = ipa_reg(ipa, IRQ_SUSPEND_EN);
offset = ipa_reg_n_offset(reg, unit);
val = ioread32(ipa->reg_virt + offset);
+
+ mask = BIT(endpoint_id);
if (enable)
val |= mask;
else
val &= ~mask;
+
iowrite32(val, ipa->reg_virt + offset);
}
--
2.34.1