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-rw-r--r--drivers/crypto/ccp/ccp-dev-v3.c52
-rw-r--r--drivers/crypto/ccp/ccp-dev.h74
-rw-r--r--drivers/crypto/ccp/ccp-ops.c52
3 files changed, 98 insertions, 80 deletions
diff --git a/drivers/crypto/ccp/ccp-dev-v3.c b/drivers/crypto/ccp/ccp-dev-v3.c
index 19eafb85708f..5b0659933b2b 100644
--- a/drivers/crypto/ccp/ccp-dev-v3.c
+++ b/drivers/crypto/ccp/ccp-dev-v3.c
@@ -20,6 +20,56 @@
#include "ccp-dev.h"
+static u32 ccp_alloc_ksb(struct ccp_cmd_queue *cmd_q, unsigned int count)
+{
+ int start;
+ struct ccp_device *ccp = cmd_q->ccp;
+
+ for (;;) {
+ mutex_lock(&ccp->sb_mutex);
+
+ start = (u32)bitmap_find_next_zero_area(ccp->sb,
+ ccp->sb_count,
+ ccp->sb_start,
+ count, 0);
+ if (start <= ccp->sb_count) {
+ bitmap_set(ccp->sb, start, count);
+
+ mutex_unlock(&ccp->sb_mutex);
+ break;
+ }
+
+ ccp->sb_avail = 0;
+
+ mutex_unlock(&ccp->sb_mutex);
+
+ /* Wait for KSB entries to become available */
+ if (wait_event_interruptible(ccp->sb_queue, ccp->sb_avail))
+ return 0;
+ }
+
+ return KSB_START + start;
+}
+
+static void ccp_free_ksb(struct ccp_cmd_queue *cmd_q, unsigned int start,
+ unsigned int count)
+{
+ struct ccp_device *ccp = cmd_q->ccp;
+
+ if (!start)
+ return;
+
+ mutex_lock(&ccp->sb_mutex);
+
+ bitmap_clear(ccp->sb, start - KSB_START, count);
+
+ ccp->sb_avail = 1;
+
+ mutex_unlock(&ccp->sb_mutex);
+
+ wake_up_interruptible_all(&ccp->sb_queue);
+}
+
static int ccp_do_cmd(struct ccp_op *op, u32 *cr, unsigned int cr_count)
{
struct ccp_cmd_queue *cmd_q = op->cmd_q;
@@ -534,6 +584,8 @@ static const struct ccp_actions ccp3_actions = {
.rsa = ccp_perform_rsa,
.passthru = ccp_perform_passthru,
.ecc = ccp_perform_ecc,
+ .sballoc = ccp_alloc_ksb,
+ .sbfree = ccp_free_ksb,
.init = ccp_init,
.destroy = ccp_destroy,
.irqhandler = ccp_irq_handler,
diff --git a/drivers/crypto/ccp/ccp-dev.h b/drivers/crypto/ccp/ccp-dev.h
index 1e30568d7c04..4e38a61fbe5d 100644
--- a/drivers/crypto/ccp/ccp-dev.h
+++ b/drivers/crypto/ccp/ccp-dev.h
@@ -147,30 +147,6 @@
#define CCP_SB_BYTES 32
struct ccp_op;
-
-/* Structure for computation functions that are device-specific */
-struct ccp_actions {
- int (*aes)(struct ccp_op *);
- int (*xts_aes)(struct ccp_op *);
- int (*sha)(struct ccp_op *);
- int (*rsa)(struct ccp_op *);
- int (*passthru)(struct ccp_op *);
- int (*ecc)(struct ccp_op *);
- int (*init)(struct ccp_device *);
- void (*destroy)(struct ccp_device *);
- irqreturn_t (*irqhandler)(int, void *);
-};
-
-/* Structure to hold CCP version-specific values */
-struct ccp_vdata {
- unsigned int version;
- const struct ccp_actions *perform;
- const unsigned int bar;
- const unsigned int offset;
-};
-
-extern struct ccp_vdata ccpv3;
-
struct ccp_device;
struct ccp_cmd;
@@ -306,13 +282,22 @@ struct ccp_device {
*/
atomic_t current_id ____cacheline_aligned;
- /* The CCP uses key storage blocks (KSB) to maintain context for certain
- * operations. To prevent multiple cmds from using the same KSB range
- * a command queue reserves a KSB range for the duration of the cmd.
- * Each queue, will however, reserve 2 KSB blocks for operations that
- * only require single KSB entries (eg. AES context/iv and key) in order
- * to avoid allocation contention. This will reserve at most 10 KSB
- * entries, leaving 40 KSB entries available for dynamic allocation.
+ /* The v3 CCP uses key storage blocks (SB) to maintain context for
+ * certain operations. To prevent multiple cmds from using the same
+ * SB range a command queue reserves an SB range for the duration of
+ * the cmd. Each queue, will however, reserve 2 SB blocks for
+ * operations that only require single SB entries (eg. AES context/iv
+ * and key) in order to avoid allocation contention. This will reserve
+ * at most 10 SB entries, leaving 40 SB entries available for dynamic
+ * allocation.
+ *
+ * The v5 CCP Local Storage Block (LSB) is broken up into 8
+ * memrory ranges, each of which can be enabled for access by one
+ * or more queues. Device initialization takes this into account,
+ * and attempts to assign one region for exclusive use by each
+ * available queue; the rest are then aggregated as "public" use.
+ * If there are fewer regions than queues, all regions are shared
+ * amongst all queues.
*/
struct mutex sb_mutex ____cacheline_aligned;
DECLARE_BITMAP(sb, KSB_COUNT);
@@ -461,4 +446,31 @@ int ccp_run_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd);
int ccp_dmaengine_register(struct ccp_device *ccp);
void ccp_dmaengine_unregister(struct ccp_device *ccp);
+/* Structure for computation functions that are device-specific */
+struct ccp_actions {
+ int (*aes)(struct ccp_op *);
+ int (*xts_aes)(struct ccp_op *);
+ int (*sha)(struct ccp_op *);
+ int (*rsa)(struct ccp_op *);
+ int (*passthru)(struct ccp_op *);
+ int (*ecc)(struct ccp_op *);
+ u32 (*sballoc)(struct ccp_cmd_queue *, unsigned int);
+ void (*sbfree)(struct ccp_cmd_queue *, unsigned int,
+ unsigned int);
+ int (*init)(struct ccp_device *);
+ void (*destroy)(struct ccp_device *);
+ irqreturn_t (*irqhandler)(int, void *);
+};
+
+/* Structure to hold CCP version-specific values */
+struct ccp_vdata {
+ unsigned int version;
+ int (*init)(struct ccp_device *);
+ const struct ccp_actions *perform;
+ const unsigned int bar;
+ const unsigned int offset;
+};
+
+extern struct ccp_vdata ccpv3;
+
#endif
diff --git a/drivers/crypto/ccp/ccp-ops.c b/drivers/crypto/ccp/ccp-ops.c
index 2c2890a4c2e2..bd9eb1d4512a 100644
--- a/drivers/crypto/ccp/ccp-ops.c
+++ b/drivers/crypto/ccp/ccp-ops.c
@@ -41,53 +41,6 @@ static const __be32 ccp_sha256_init[CCP_SHA_CTXSIZE / sizeof(__be32)] = {
cpu_to_be32(SHA256_H6), cpu_to_be32(SHA256_H7),
};
-static u32 ccp_alloc_ksb(struct ccp_device *ccp, unsigned int count)
-{
- int start;
-
- for (;;) {
- mutex_lock(&ccp->sb_mutex);
-
- start = (u32)bitmap_find_next_zero_area(ccp->sb,
- ccp->sb_count,
- ccp->sb_start,
- count, 0);
- if (start <= ccp->sb_count) {
- bitmap_set(ccp->sb, start, count);
-
- mutex_unlock(&ccp->sb_mutex);
- break;
- }
-
- ccp->sb_avail = 0;
-
- mutex_unlock(&ccp->sb_mutex);
-
- /* Wait for KSB entries to become available */
- if (wait_event_interruptible(ccp->sb_queue, ccp->sb_avail))
- return 0;
- }
-
- return KSB_START + start;
-}
-
-static void ccp_free_ksb(struct ccp_device *ccp, unsigned int start,
- unsigned int count)
-{
- if (!start)
- return;
-
- mutex_lock(&ccp->sb_mutex);
-
- bitmap_clear(ccp->sb, start - KSB_START, count);
-
- ccp->sb_avail = 1;
-
- mutex_unlock(&ccp->sb_mutex);
-
- wake_up_interruptible_all(&ccp->sb_queue);
-}
-
static u32 ccp_gen_jobid(struct ccp_device *ccp)
{
return atomic_inc_return(&ccp->current_id) & CCP_JOBID_MASK;
@@ -1214,7 +1167,8 @@ static int ccp_run_rsa_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
memset(&op, 0, sizeof(op));
op.cmd_q = cmd_q;
op.jobid = ccp_gen_jobid(cmd_q->ccp);
- op.sb_key = ccp_alloc_ksb(cmd_q->ccp, sb_count);
+ op.sb_key = cmd_q->ccp->vdata->perform->sballoc(cmd_q, sb_count);
+
if (!op.sb_key)
return -EIO;
@@ -1293,7 +1247,7 @@ e_exp:
ccp_dm_free(&exp);
e_sb:
- ccp_free_ksb(cmd_q->ccp, op.sb_key, sb_count);
+ cmd_q->ccp->vdata->perform->sbfree(cmd_q, op.sb_key, sb_count);
return ret;
}
generated by cgit (git 2.34.1) at 2024-06-26 07:52:06 +0000